blob: 076f2d6fac2bdb715e44a40bf6c8876e9d6eee05 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
|
/* Copyright (c) 2018, The Linux Foundation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
* only version 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
/* Early domain services invoked in bootloaders run in parallel after
* kernel takes over. One page in memory is reserved to pass information
* between bootloader and kernel. This page has a header to capture status,
* request and cpumask described in structure early_domain_header. Early
* domain core driver in kernel reads this header to decide the status of
* services and takes necessary action. The rest of the page is intended to
* pass service specific information. Offset for service specific area are
* defined in macros, and its the service specific driver's responsiblity
* to operate in their defined areas to pass service specific information.
* *
* *
* *
* *****************************************
* * Header *
* * *
* *****************************************
* * *
* * Early display *
* * *
* * *
* *****************************************
* * *
* * Early camera *
* * *
* * *
* *****************************************
* * *
* * Early audio *
* * *
* * *
* *****************************************
* *
*/
enum service_id {
EARLY_DOMAIN_CORE = 0,
EARLY_DISPLAY,
EARLY_CAMERA,
EARLY_AUDIO,
};
#ifdef CONFIG_QCOM_EARLY_DOMAIN
#include <linux/workqueue.h>
#include <linux/cpumask.h>
#include <linux/pm_qos.h>
#include <linux/notifier.h>
#define EARLY_DOMAIN_MAGIC "ERLYDOM"
#define MAGIC_SIZE 8
#define NUM_SERVICES 3
#define SERVICE_SHARED_MEM_SIZE ((PAGE_SIZE)/(NUM_SERVICES))
struct early_domain_header {
char magic[MAGIC_SIZE];
unsigned long cpumask;
unsigned long early_domain_status;
unsigned long early_domain_request;
};
struct early_domain_core {
struct platform_device *pdev;
struct early_domain_header *pdata;
struct work_struct early_domain_work;
phys_addr_t lk_pool_paddr;
size_t lk_pool_size;
phys_addr_t early_domain_shm;
size_t early_domain_shm_size;
cpumask_t cpumask;
struct notifier_block ed_notifier;
struct pm_qos_request ed_qos_request;
struct wakeup_source ed_wake_lock;
};
void request_early_service_shutdown(enum service_id);
bool get_early_service_status(enum service_id sid);
void *get_service_shared_mem_start(enum service_id sid);
#else
static inline void request_early_service_shutdown(enum service_id sid) {}
static inline bool get_early_service_status(enum service_id sid)
{ return false; }
static inline void *get_service_shared_mem_start(enum service_id sid)
{ return NULL; }
#endif
|
